The sleeve you use should be smaller outside diameter than the inside diameter of the barrel. If you are unsure, find the directions to your spring winder and study those. Because of all the energy stored in that wound spring, a mishap can cause injury. You are wearing leather gloves and eye protection when messing with springs, aren't you?
You may have additional problems beyond the broken/unhooked spring.
When springs release quickly, the shock force can and will bend the arbor on the second wheel and maybe the third. That shock can also bend or rip teeth off of the barrel, the second pinion, etc. Before reassembly of the movement, those all should be checked and proper repairs made.
Then comes the big news. At times, the spring failure is secondary damage. Secondary because of a click assembly failing. If you fix all of the other damage and not the click assembly, the click may release again causing the same problem that you just repaired.
Carefully inspect the click for a loose pivot rivet, a weak spring, or a damaged ratchet wheel and any distortion to the click itself. If you find one needs repair, it is well to remedy problems on both click assemblies. If failure was from use, it makes good sense that both springs have been wound the same number of times. Click assemblies must work every time over the lifespan of the clock movement.
For many reasons, a mentor would be a great help to you. Is there a possibility? Your profile does not say where you live. Maybe someone from this board or the NAWCC could help out.
My feeling is that you are into this project well beyond your capabilities.
Best Regards,
Dick
